#include<bits/stdc++.h>
using namespace std;
int fx[8]={-1,1,0,0,1,-1,-1,1};
int fy[8]={0,0,1,-1,1,-1,1,-1};
int n,m,s;
char a[101][101];
int dfs(int x,int y){
    for(int i=0;i<=7;i++){
        int tx=x+fx[i];
        int ty=y+fy[i];
        if(tx>=1&&tx<=n&&ty>=1&&ty<=m&&a[tx][ty]=='W'){
            a[tx][ty]='.';
            dfs(tx,ty);
        }
    }
}
int main(){
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cin>>a[i][j];
        }
    }
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            if(a[i][j]=='W'){
                s++;
                dfs(i,j);
            }
        }
    }
    cout<<s;
    return 0;
}
/**************************************************************
	Problem: 1435
	User: fzy001
	Language: C++
	Result: Accepted
	Time:20 ms
	Memory:2084 kb
****************************************************************/